介绍了电控发动机微机控制故障模拟系统的组成和工作原理 ,阐述了微机控制故障模拟系统的微机控制单元、故障模拟电路和电路显示板的结构特征和设计。该系统是在原车基础上对发动机的微机系统进行线路改造 ,并另设一套微机控制故障模拟系统 ,微机控制故障模拟系统可不断重复产生发动机不同工况下传感器、执行器、控制单元、控制电路的各种模拟故障 ,为使用者提供丰富的检测内容和便利的检测端口 The composition and working principle of computer controlled fault simulation system of electronic control engine are introduced. The structure features and design of microcomputer control unit, fault simulation circuit and circuit display panel of microcomputer controlled fault simulation system are expounded. The system is based on the original car engine computer system for line transformation, and another set of computer control fault simulation system, computer control fault simulation system can be repeated under different engine conditions sensors, actuators, control unit, control Circuit simulation of various failures, to provide users with a wealth of testing content and convenient detection port